6639493588 has 48 divisors (see below), whose sum is σ = 14649272064. Its totient is φ = 2562543360.

The previous prime is 6639493517. The next prime is 6639493621. The reversal of 6639493588 is 8853949366.

It is a super-2 number, since 2×6639493588² = 88165750210186227488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207520 + ... + 237367.

It is an arithmetic number, because the mean of its divisors is an integer number (305193168).

Almost surely, 2^6639493588 is an apocalyptic number.

It is an amenable number.

6639493588 is an abundant number, since it is smaller than the sum of its proper divisors (8009778476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6639493588 is a wasteful number, since it uses less digits than its factorization.

6639493588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444952 (or 444950 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 61.

The square root of 6639493588 is about 81483.0877421812. The cubic root of 6639493588 is about 1879.5114910764.

It can be divided in two parts, 663949358 and 8, that added together give a palindrome (663949366).

The spelling of 6639493588 in words is "six billion, six hundred thirty-nine million, four hundred ninety-three thousand, five hundred eighty-eight".